*{
    margin: 0;
    padding: 0;
}
/*头部*/
.top{
    width: 1600px;
    height: 40px;
    background-color: black;
    color: white;
    font-size: 18px;
}
.infor{
    line-height: 40px;
    margin-left: 180px;
}
/*登录窗口*/
.register{
    width: 400px;
    height: 260px;
    margin: auto;
    background-color: black;
    margin-top: 200px;
    opacity: 0.8;
    display: block;
}
.login{
    margin-left: 10px;
    line-height: 50px;
    font-size: 25px;
    color: white;
}
.Administrator{
    margin-left: 15px;
    margin-top: 20px;
    color: white;
    font-size: 14px;
}
.Administrator input{
    width: 220px;
    height: 24px;
}
#reminder{
    margin-left: 10px;
    font-size: 13px;
    color: red;
}
#hint{
    margin-left: 10px;
    font-size: 13px;
    color: red;
}
.enter{
    margin: 40px;
    width: 60px;
    height: 25px;
    border-radius: 5px;
    background-color: seagreen;
    color: white;
    border: none;
    float: left;
}
.enroll{
    margin: 40px 50px 60px 75px;
    width: 60px;
    height: 25px;
    border-radius: 5px;
    background-color: seagreen;
    color: white;
    border: none;
    float: left;
}
.have{
    width: 400px;
    height: 260px;
    margin: auto;
    background-color: black;
    margin-top: 200px;
    opacity: 0.8;
    color: white;
    display: none;
}
.yes{
    margin: 40px 150px;
    width: 60px;
    height: 25px;
    border-radius: 5px;
    background-color: seagreen;
    color: white;
    border: none;
    float: left;
}